Daisuke Dojima, a 2nd-year student in high school who was kidnapped when he was younger, experiences a strange phenomenon along with his friends Gai, Lu, Marimari, and Keisaku: “Shibuya Adrift”. The center of the city of Shibuya is transported more than 300 years in the future where there is nothing but vast wastelands… and hostile beings called “Revisions” that control massive mechanical monsters. As the monsters tear through Shibuya, someone appears to save the people: a girl with the same name, “Milo”, and the same looks as the one who helped Daisuke when he was kidnapped. She gives Daisuke and his friends, weapons called “String Puppets” that they can pilot, and tells them to protect Shibuya.